{"action":"created","comment":{"url":"https://api.github.com/repos/pingcap/tidb/pulls/comments/120599650","pull_request_review_id":42574140,"id":120599650,"diff_hunk":"@@ -123,10 +126,19 @@ func (e *SetExecutor) executeSet() error {\n \t\t\tif err != nil {\n \t\t\t\treturn errors.Trace(err)\n \t\t\t}\n+\t\t\tolsSnapshotTS := sessionVars.SnapshotTS\n \t\t\terr = varsutil.SetSessionSystemVar(sessionVars, name, value)\n \t\t\tif err != nil {\n \t\t\t\treturn errors.Trace(err)\n \t\t\t}\n+\t\t\tnewSnapshotIsSet := sessionVars.SnapshotTS > 0 && sessionVars.SnapshotTS != 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not this logic before line 129?","created_at":"2017-06-07T11:28:16Z","updated_at":"2017-06-07T11:28:16Z","html_url":"https://github.com/pingcap/tidb/pull/3416#discussion_r120599650","pull_request_url":"https://api.github.com/repos/pingcap/tidb/pulls/3416","_links":{"self":{"href":"https://api.github.com/repos/pingcap/tidb/pulls/comments/120599650"},"html":{"href":"https://github.com/pingcap/tidb/pull/3416#discussion_r120599650"},"pull_request":{"href":"https://api.github.com/repos/pingcap/tidb/pulls/3416"}}},"pull_request":{"url":"https://api.github.com/repos/pingcap/tidb/pulls/3416","id":124371325,"html_url":"https://github.com/pingcap/tidb/pull/3416","diff_url":"https://github.com/pingcap/tidb/pull/3416.diff","patch_url":"https://github.com/pingcap/tidb/pull/3416.patch","issue_url":"https://api.github.com/repos/pingcap/tidb/issues/3416","number":3416,"state":"open","locked":false,"title":"executor: validate snapshot 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